07-17-2009, 11:48 PM
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#1 (permalink)
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Grasshopper
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Matching Tire Size - Mismatched Brand - Air Pressure
sorry for the edit, info changed around
ok, so i got 4 new tires (90%+ tread) on steelies
3 are sumitomo (51 psi)
1 is "i forgot" (44 psi)
all 4 are 175/70R13
what do i do about tire pressure?
44 to be safe
50 to chance
or throw caution to the wind and go for 60
Last edited by alohaspirit; 07-19-2009 at 12:11 AM..
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07-19-2009, 10:51 AM
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#2 (permalink)
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Dartmouth 2010
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I wouldn't inflate passed the maximum a tire is designed for. You would get better mileage gains for moon discs, etc.
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07-19-2009, 01:50 PM
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#3 (permalink)
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Moderate your Moderation.
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You'll have to find the load rating for each tire at a given pressure, and inflate them all to a pressure where the load ratings correspond for best handling characteristics. Some tires do not have max load at max pressure, and some do.
They don't need to be even pressures, either. If your Sumi's have max load at 51 PSI, then your other one has max load at 41 PSI, do that.
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07-19-2009, 04:30 PM
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#4 (permalink)
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Grasshopper
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thanks for the replies
one of the mpg rules are to max or (overinflate) your tires
so i was curious what everyone would say
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07-19-2009, 08:36 PM
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#5 (permalink)
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Grasshopper
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Quote:
Originally Posted by Christ
You'll have to find the load rating for each tire at a given pressure, and inflate them all to a pressure where the load ratings correspond for best handling characteristics. Some tires do not have max load at max pressure, and some do.
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Quote:
Originally Posted by Christ
I've run overinflated tires for years... I mean seriously over inflated... and probably over loaded, as well. Still haven't had problems with uneven wear
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So which ones better?
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07-19-2009, 08:50 PM
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#6 (permalink)
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Moderate your Moderation.
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I personally run overinflated, but I don't usually recommend it to others. Sure, there might be safety concerns, and that's why I don't offer it as advice normally.
For me, overinflated helps with laziness as well as mileage. I hate checking my tire pressure. YMMV.
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07-19-2009, 09:11 PM
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#7 (permalink)
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Grasshopper
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I usually go over too
but i wonder if im making too much of a deal out of this
im just not used to running different tire brands
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07-19-2009, 09:18 PM
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#8 (permalink)
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Moderate your Moderation.
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Just do what I said earlier until you can get a replacement tire that matches the Sumi's, so you can use the "I forgot" (never heard of that one... ) for a full size spare.
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07-19-2009, 09:30 PM
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#9 (permalink)
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Grasshopper
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Quote:
Originally Posted by Christ
Just do what I said earlier until you can get a replacement tire that matches the Sumi's, so you can use the "I forgot" (never heard of that one... ) for a full size spare.
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i think its a bridgestone (still not sure)
im not going to be getting another tire so these are IT
so i guess ill go recommended max on all 4
i got the set for $60 btw
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